Note 17 - Industry Segment Information - Net Sales and Income (Loss) by Industry Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Revenue from Contract with Customer, Including Assessed Tax	$ 193,771	$ 192,147	$ 582,380	$ 566,982
Income from operations	15,046	18,819	57,898	54,516
Restructuring costs	(549)	(1,060)	(1,173)	(5,792)
Acquisition-related costs	(805)	(1,254)	(2,352)	(2,962)
Interest expense	(3,230)	(2,286)	(8,598)	(5,800)
Other non-operating income	(679)	(1,014)	(1,694)	(1,350)
Income from continuing operations before income taxes	11,137	15,519	47,606	47,366
Engraving Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	37,135	33,749	111,602	100,457
Income from operations	4,485	7,195	18,883	21,735
Restructuring costs	(173)	(188)	(239)	(1,270)
Electronics Products Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	50,197	51,213	154,347	144,082
Income from operations	9,418	11,221	32,581	31,774
Restructuring costs	(301)	(84)	(314)	(299)
Engineering Technologies Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	27,467	23,426	71,818	65,621
Income from operations	2,800	1,155	6,636	3,879
Restructuring costs		(26)	(116)	(1,061)
Hydraulics Products Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	15,106	12,878	39,758	34,969
Income from operations	2,242	1,749	5,753	5,138
Food Service Equipment Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	63,866	70,881	204,855	221,853
Income from operations	3,559	5,546	15,417	19,834
Restructuring costs		(748)	(367)	(2,819)
Corporate and Other [Member]
Income from operations	(6,104)	(5,733)	(17,847)	(19,090)
Restructuring costs	$ (75)	$ (14)	$ (137)	$ (343)